Improvement in slates



WILLIAM F. BAADE.

Improved Slate.

I mm August 15, 1871.

w'i'rria ssz W W I INVENTOR PATENT QFFICE.

WILLIAM F. BAADE, OF BUFFALO, NEW YORK.

IMPROVEMENT IN SLATES.

Specification forming part of Letters Patent No. 117,964, dated August 15, 1871.

To all whom it may concern:

Be it known that I, WILLIAM F. BAADE, of Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Slates, of which the following is a specification This invention relates to the combination of a rule with a slate, when arranged so as to be movable over the face of the same, and kept in place by means of grooves made in the sides of the frame, the object being to afford an easy and ready means for drawing parallel lines.

Figure 1' is a plan. view of the slate, showing the arrangement of the rule with the device for holding the pencil and sponge. Fig. 2 is a transverse section through the center of the slate and frame, showing the grooves for receiving the rule, also, a side view of rule, &c. The drawing represents one of the smaller sizes, several sizes bein g used.

A represents the frame; B, the slate; (1,the rule. It slides over the face of the slate so that parallel lines may be drawn. It is retained in place by means of the grooves D D made in the frame, into which the ends E and F are inserted, as shown, so as to move easily along the said grooves. G represents the spring for holding the sponge and pencil, H being the part for holding the sponge, and I the part for holding the pencil.

I claim as my invention The combination of the slate B with the rule 0, arranged within grooves, substantially as and for the purposes described.

WVitnesses: WILLIAM F. BAADE.

JAMES SANGSTER, AMos W. SANGsrER. 

